I'm using Mac Yosemite 10.10.2 and newest macvim, but when I use fullscreen mode, the lines at the top of screen will be black, and if I move my mouse there, it will show the system line..
I want to get my fullscreen back.
This is a known issue, happened me. A couple of work a rounds are:
There is also a .diff patch on https://code.google.com/p/macvim/issues/detail?id=514#c2